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Tabulata :: Tabulata (n. pl.) An artificial group of stony corals including those which have transverse septa in the calicles. The genera Pocillopora and Favosites are examples.

Ascidioidea :: Ascidioidea (n. pl.) A group of Tunicata, often shaped like a two-necked bottle. The group includes, social, and compound species. The gill is a netlike structure within the oral aperture. The integument is usually leathery in texture. See Illustration in Appendix..

Nitryl :: Nitryl (n.) A name sometimes given to the nitro group or radical.

Gymnocopa :: Gymnocopa (n. pl.) A group of transparent, free-swimming Annelida, having setae only in the cephalic appendages..

Synthesis :: Synthesis (n.) The art or process of making a compound by putting the ingredients together, as contrasted with analysis; thus, water is made by synthesis from hydrogen and oxygen; hence, specifically, the building up of complex compounds by special reactions, whereby their component radicals are so grouped that the resulting substances are identical in every respect with the natural articles when such occur; thus, artificial alcohol, urea, indigo blue, alizarin, etc., are made by synthesis..

Superfecundation :: Superfamily (n.) A group intermediate between a family and a suborder.

Cohort :: Cohort (n.) A natural group of orders of plants, less comprehensive than a class..

Azo- :: Azo- () Now especially applied to compounds containing a two atom nitrogen group uniting two hydrocarbon radicals, as in azobenzene, azobenzoic, etc. These compounds furnish many artificial dyes. See Diazo-..

Yttrium :: Yttrium (n.) A rare metallic element of the boron-aluminium group, found in gadolinite and other rare minerals, and extracted as a dark gray powder. Symbol Y. Atomic weight, 89..

Ytterbium :: Ytterbium (n.) A rare element of the boron group, sometimes associated with yttrium or other related elements, as in euxenite and gadolinite. Symbol Yb; provisional atomic weight 173.2. Cf. Yttrium..

Saccharose :: Saccharose (n.) Cane sugar; sucrose; also, in general, any one of the group of which saccharose, or sucrose proper, is the type. See Sucrose..

Ganocephala :: Ganocephala (n. pl.) A group of fossil amphibians allied to the labyrinthodonts, having the head defended by bony, sculptured plates, as in some ganoid fishes..

Yellows :: Yellows (n.) A group of butterflies in which the predominating color is yellow. It includes the common small yellow butterflies. Called also redhorns, and sulphurs. See Sulphur..

Degrade :: Degrade (v. i.) To degenerate; to pass from a higher to a lower type of structure; as, a family of plants or animals degrades through this or that genus or group of genera..

Cluster :: Cluster (v. i.) To grow in clusters or assemble in groups; to gather or unite in a cluster or clusters.

Favella :: Favella (n.) A group of spores arranged without order and covered with a thin gelatinous envelope, as in certain delicate red algae..

Folks :: Folks (n. collect. & pl.) In Anglo-Saxon times, the people of a group of townships or villages; a community; a tribe..

Xylene :: Xylene (n.) Any of a group of three metameric hydrocarbons of the aromatic series, found in coal and wood tar, and so named because found in crude wood spirit. They are colorless, oily, inflammable liquids, C6H4.(CH3)2, being dimethyl benzenes, and are called respectively orthoxylene, metaxylene, and paraxylene. Called also xylol..

Strepsipterous :: Strepsiptera (n. pl.) A group of small insects having the anterior wings rudimentary, and in the form of short and slender twisted appendages, while the posterior ones are large and membranous. They are parasitic in the larval state on bees, wasps, and the like; -- called also Rhipiptera. See Illust. under Rhipipter..

Squamoid :: Squamipen (n.) Any one of a group of fishes having the dorsal and anal fins partially covered with scales.

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